Many members of the medical profession are doubtless unaware of the enactment in Illinois of a very effective law, placing the duty of inspection of factories in which children are employed under a superintendent. The law absolutely prohibits the employment in factories of children under fourteen years of age. It provides that all children between fourteen and sixteen shall have a certificate, from an authorized physician, asserting that they are in such health and in such a state of development as to permit them in the judgment of the physician to work in the factories without danger. This certificate must assert that the physician has examined the applicant and seen him at work, and that he considers him able to do the work proposed without detriment to his subsequent health. In the operation of this law, children have brought to the inspector, certificates from physicians who have evidently made them